JP6717274B2 - Defective part removal method and defective part removal device for steel plate coil outer winding part - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for removing a defective portion such as a defective shape or a defective sheet thickness existing in an outer winding portion of a steel plate coil placed in an up-end state, and a removing device used for the method.

The grain-oriented electrical steel sheet, which is mainly used as the core material for large transformers and rotating machines, is produced by subjecting cold-rolled steel sheet to primary recrystallization annealing that also serves as decarburization annealing, and then finishing. It is generally manufactured by annealing. In the finish annealing, in order to cause secondary recrystallization, and also to remove the inhibitor component used for the secondary recrystallization, further, a glassy coating called forsterite on the steel sheet surface. In order to form it, it is necessary to keep the temperature near 1200° C. for a long time.

Therefore, it is difficult to continuously anneal the finish annealing, and even now, the steel plate coil is placed in the up end (the coil center axis (winding axis) is perpendicular to the ground). It is performed by batch annealing (box annealing) in which annealing is performed. However, if the steel plate coil is kept in an up-end state and kept at a high temperature for a long time, the outer peripheral portion and the inner peripheral portion of the steel plate coil are overheated. It may be deformed due to buckling due to its own weight and cause a defective shape. Further, since the outer peripheral portion of the steel plate coil corresponds to the end portion of the coil, it is also a place where defective surface appearance and defective plate thickness easily occur.

When the length of the defective portion such as the defective shape is short, the defective portion can be removed in the next step, for example, at the entry side of the flattening annealing line or the like for the purpose of correcting the shape (see, for example, Patent Document 1). However, the shape-defective portion of the coil outer-winding portion due to the finish annealing may have a length of several tens of meters or more. In such a case, in order to remove the defective portion, the sheet passing through the annealing line is performed. The speed must be reduced or, at worst, the line must be stopped, which not only lowers productivity but also adversely affects product quality. Therefore, in such a case, it is carried out offline and separately passed through a adjusting line such as a recoiling line to remove the defective portion (see, for example, Patent Document 2), and the distribution is confused. And productivity was reduced. Further, the above-mentioned off-line processing requires a dedicated line for that purpose, so that there is a problem that a large amount of equipment investment is required. In addition, as a technique for removing a defective portion of the outer coil portion of the steel sheet coil, for example, there is a technique disclosed in Patent Document 3, but this technique has a length of several meters generated in the outermost coil portion of the hot rolled steel sheet coil. However, the present invention cannot be applied to the removal of defective portions having a length of several tens of meters or more, which is the object of the present invention.

Japanese Patent Laid-Open No. 10-0151519 JP-A-11-0010226 JP, 2003-213340, A

As described above, in the prior art, there is an effective technique for removing a defective portion having a length of several tens of meters or more generated in the outer coil portion of the steel plate coil placed in the up-end state after finish annealing. Absent.

The invention of the present application has been made in view of the above problems of the prior art, and the object thereof is that the length of the outer coil portion of the steel plate coil in the up-end state after finish annealing reaches several tens of meters or more. It is an object of the present invention to provide a defective portion removing method of a steel sheet coil outer winding portion capable of efficiently removing a defective portion such as a defective shape with a simple device, and to provide a defective portion removing device used in the above method.

The inventors diligently studied a method for removing a defective portion of an outer winding portion of a steel plate coil in an up-end state, in order to solve the above problems. As a result, a defective part winding machine is separately installed near the outer circumference of the steel plate coil in the up-end state, and the defective part winding machine is swung (revolved) along the outer circumference of the steel plate coil to rewind the steel plate. Meanwhile, the unwound steel plate is wound (revolving) by rotating the defective portion winder, or the steel plate coil is rotated (revolving) to rewind the steel plate, and at the same time, the unwound steel plate is It has been found that the above problems can be solved by rotating (rotating) the defective portion winding machine to wind the defective portion winding machine, and has developed the present invention.

The present invention based on the above knowledge is a method of removing a defective portion of a steel sheet coil outer winding portion placed in an up-end state, wherein the defective portion is installed adjacent to the outer peripheral portion of the steel sheet coil and is parallel to the central axis of the steel sheet coil. A defective portion removing method for a steel sheet coil outer winding portion is proposed in which a defective portion of a steel sheet coil outer winding portion is wound up and removed by a defective portion winding machine that rotates around the.

The defective portion removing method of the present invention is such that while rotating the defective portion winding machine along the outer periphery of the steel sheet coil to rewind the steel sheet, the defective portion winding machine is rotated to wind the rewound steel sheet. It is characterized in that the defective portion of the outer coil portion of the steel plate coil is removed by removing.

Further, in the defective portion removing method of the present invention, the steel sheet coil is rewound while rotating the steel sheet coil around the coil central axis, and the defective portion winding machine is rotated to wind up the rewound steel sheet. Thus, the defective portion of the steel coil outer winding portion is removed.

Further, the defective portion removing method of the present invention is characterized in that the rewound steel sheet is wound such that the steel sheet tension between the defective portion winder and the steel sheet coil has a positive value.

Further, the defective portion removing method of the present invention is characterized in that a looper roll is brought into contact with the steel plate between the defective portion winder and the steel plate coil.

Further, the steel sheet coil in the defective portion removing method of the present invention is characterized in that the steel sheet coil is a grain-oriented electrical steel sheet coil after finish annealing.

Further, according to the present invention, the defective portion of the steel sheet coil outer winding portion placed in the up-end state is installed adjacent to the outer peripheral portion of the steel sheet coil and rotates about an axis parallel to the central axis of the steel sheet coil. (EN) Provided is a defective portion removing device for a steel plate coil outer winding portion which is wound up and removed by a defective portion winding machine.

The defective portion removing device of the present invention is characterized in that while the defective portion winding machine is rotating, the defective portion winding device revolves around the outer circumference of the steel plate coil to rewind the steel plate and winds the unwound steel plate. And

Further, the defective portion removing apparatus of the present invention includes a coil rotating device that rewinds the steel plate while rotating the steel plate coil about the central axis of the coil, and the steel plate rewound by the coil rotating device is The defective portion winding machine is rotated to wind the defective portion winding machine.

Further, the defective portion removing apparatus of the present invention is a means for measuring the steel plate tension between the defective portion winding machine and the steel plate coil, and the measured steel sheet tension is a positive value, It is characterized by having a rotation speed control device for controlling the rotation speed and the turning speed, or for controlling the rotation speeds of the defective portion winding machine and the steel plate coil.

Further, the defective portion removing apparatus of the present invention is characterized in that a looper roll that comes into contact with the steel plate is disposed between the defective portion winder and the steel plate coil.

According to the present invention, the defective shape portion of the steel sheet coil outer-winding portion after finish annealing can be efficiently removed with simple equipment in the up-end state, and the continuous annealing line in the next step or the like. Since it is not necessary to remove the recoiling line off-line, it greatly contributes to the improvement of productivity, quality, and distribution.

Defective part A defective part of a type in which the defective part of the outer coil part of the steel plate coil is removed by revolving the steel plate coil around the outer circumference of the steel plate coil and rotating it while rewinding the steel plate to wind up the unwound steel plate. It is a figure explaining a removal method and a device. A method of removing a defective portion of a type of removing a defective portion of a steel sheet coil outer winding portion by rotating a steel sheet coil to rewind the steel sheet and winding the rewound steel sheet to rotate by a defective portion winding machine, and It is a figure explaining an apparatus. It is a figure explaining a mandrel type defective part winding machine. It is a figure which shows the example which provided the looper roll in the defective part removal apparatus of FIG.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
A method and apparatus for removing a defective portion of an outer winding portion of a steel sheet coil according to the present invention is installed adjacent to an outer peripheral portion of a steel sheet coil and rotates about an axis parallel to a central axis (winding axis) of the steel sheet coil. It is characterized in that the defective portion of the steel sheet coil outer winding portion is wound up and removed by a defective portion winding machine that rotates. Here, the method and apparatus for removing the defective portion of the outer winding portion of the steel plate coil have the following two embodiments from the movement of the defective portion winding machine and the steel plate coil.

<First Embodiment>
In the first embodiment of the present invention, as shown in FIG. 1, after winding the defective portion end portion of the outermost wound steel sheet 1 of the steel sheet coil 2 around the defective portion winding machine 3, the defective portion winding is performed. By winding (revolving) the winder 3 along the outer periphery of the steel plate coil 2 to rewind the steel plate 1, and winding the rewound steel plate 1 by rotating (rotating) the defective portion winder 3 to wind it up. A method and apparatus for removing a defective portion of a steel coil outer winding portion. The defective portion winding machine 3 shown in FIG. 1 rotates left to wind the steel sheet coil as viewed from above, but as shown by a broken line in FIG. You may take it.

Therefore, in the apparatus for carrying out this method, in addition to the drive unit (not shown) that rotates (rotates) the defective portion winding machine, the defective portion winding machine is swung (revolved) along the outer circumference of the steel plate coil. 2) are required to drive the drive.

<Second Embodiment>
Further, in the second embodiment of the present invention, as shown in FIG. 2, after winding the defective portion end of the outermost wound steel sheet 1 of the steel sheet coil 2 around the defective portion winding machine 3, The coil 2 is rotated (rotated) around the center axis (winding shaft) 2a of the coil to rewind the steel sheet 1, and the unwound steel sheet 1 is rotated (rotated) by the defective portion winding machine 3. It is a method and a device for removing a defective portion of the outer winding portion of the steel sheet coil by winding it up with a coil. The defective portion winding machine 3 shown in FIG. 2 rotates left to wind the steel sheet coil when viewed from above, but as shown by the broken line in FIG. You may take it.

Therefore, in the apparatus for carrying out this method, in addition to the drive unit (not shown) for rotating (spinning) the defective portion winder, the steel sheet coil is rotated (spinning) to rewind the steel sheet. No coil rotator required. The coil rotating device may rotate the steel plate coil 2 itself, or may rotate the steel plate coil 2 together with the coil mounting table (4 in FIG. 2) on which the steel plate coil 2 is mounted.

Here, the defective portion winding machine is not particularly limited as long as it has a structure capable of winding a steel plate, and is generally used for a tension reel (winding) such as a recoiling line, A mandrel type one in which a steel plate is wound around a cylindrical mandrel 5 as shown in FIG. 3 is suitable. In the case of the mandrel type, in order to wind the steel plate, a gripper or a groove 5a for sandwiching the front end of the steel plate may be provided on the surface of the mandrel, or a belt trumpet may be provided.

Further, the defective portion removing device of the present invention, when winding the steel sheet by the defective portion winding machine, plate breakage due to a sudden change in tension between the defective portion winding machine and the steel sheet coil, and the defective portion winding machine. In order to prevent the winding failure of the steel plate due to the slack between the steel plate coil and the steel plate coil, the steel plate tension becomes positive from the outside diameter of the defective steel plate wound by the defective part winding machine and the outside diameter of the remaining steel plate coil. As described above, it is possible to have a rotation speed control device for controlling the rotation speeds (rotational speed and revolution speed) of the defective portion winder, or for controlling the respective rotation (rotation) speeds of the defective portion winder and the steel plate coil. preferable. The tension between the defective portion winder and the steel plate coil is preferably 0.1 MPa or more.

Further, for the same purpose as described above, the defective portion removing device of the present invention is a steel plate measured by the tension measuring device, in which a tension measuring device for measuring the steel plate tension is installed between the defective portion winding machine and the steel plate coil. The rotation speed (rotation speed and revolution speed) of the defective part winder is controlled so that the tension falls within a predetermined range, or the rotation (rotation) speeds of the defective part winder and the steel plate coil are controlled. It is preferable to have rotational speed control.

Further, for the same purpose as described above, the defective portion removing apparatus of the present invention installs a looper roll (dancer roll) whose position varies depending on the steel plate tension between the defective portion winder and the steel plate coil, and the looper roll (dancer roll) is installed. ) Is within the specified range, the rotation speed (rotation speed and revolution speed) of the defective part winder is controlled, or the rotation (rotation) speeds of the defective part winder and the steel plate coil are adjusted. It is preferable to have a rotating speed control device for controlling. As an example, FIG. 4 shows an example in which a looper roll is arranged in the plan view of the defective portion removing apparatus of FIG. Although the looper roll is arranged on the steel plate coil side with respect to the steel plate between the defective portion winding machine and the steel plate coil in FIG. 4, it may be arranged on the opposite side.

Further, for the same purpose as above, the defective portion removing apparatus of the present invention estimates the steel plate tension between the defective portion winder and the steel plate coil from the power consumption of the motor that drives the defective portion winder, The electric power of the defective portion winding machine may be controlled so that the tension falls within a predetermined range.

In the above description of the present invention, the defective portion removing method and device focusing on the removal of the defective portion generated in the coil outer winding portion of the grain-oriented electrical steel sheet after finish annealing are explained, but the technique of the present invention is The present invention is not limited to the magnetic electrical steel sheet, and can be applied to any steel sheet coil that is annealed in a state of being placed in an up-end-end state. Further, it goes without saying that the coil is not limited to the steel plate coil.

1: (Rewound) steel plate 2: Steel plate coil 2a: Coil center axis 3: Defective part winding machine 4: Coil stand 5: Mandrel 5a: Gripper (groove)
6: Looper roll (dancing roll)

Claims (11)

A method for removing a defective portion of an outer winding portion of a steel sheet coil placed in an up-end state, the defective portion being installed adjacent to an outer peripheral portion of the steel sheet coil and rotating about an axis parallel to the central axis of the steel sheet coil. A method for removing a defective portion of a steel sheet coil outer winding portion by winding up and removing a defective portion of the steel sheet coil outer winding portion with a winder. While rotating the defective portion winder around the outer circumference of the steel sheet coil to rewind the steel sheet, the defective portion winder is rotated to wind up the rewound steel sheet, whereby the outer coil portion of the steel sheet coil is defective. The defective portion removing method according to claim 1, wherein the defective portion is removed. The steel plate coil is rewound while rotating around the coil center axis, and the defective part winding machine is rotated to wind up the unwound steel plate to remove the defective part of the outer coil part of the steel plate coil. The defective part removing method according to claim 1, wherein The defective part according to any one of claims 1 to 3, wherein the unwound steel plate is wound so that the steel plate tension between the defective part winder and the steel plate coil has a positive value. Removal method. The defective portion removing method according to any one of claims 1 to 4, wherein a looper roll is brought into contact with the steel plate between the defective portion winder and the steel plate coil. The said steel plate coil is a coil of the grain-oriented electrical steel plate after performing finish annealing, The defective part removal method of any one of Claims 1-5 characterized by the above-mentioned. The defective part of the outer winding part of the steel plate coil placed in the up-end state is installed adjacent to the outer peripheral part of the steel plate coil and rotates around a shaft parallel to the central axis of the steel plate coil. A defective part removing device for the outer coil of a steel plate coil that winds up and removes. 8. The defective part according to claim 7, wherein the defective part winding machine is rotated along the outer circumference of the steel plate coil to rewind the steel plate while the defective part winding machine is rotating, and the unwound steel plate is wound up. Removal device. A coil rotating device that rewinds the steel plate while rotating the steel plate coil about the central axis of the coil, and winds the steel plate rewound by the coil rotating device by rotating the defective portion winding machine. The defective portion removing device according to claim 7, wherein the defective portion removing device is used. Means for measuring the steel plate tension between the defective part winder and the steel plate coil, and controlling the rotation speed and swivel speed of the defective part winder so that the measured steel plate tension has a positive value, or The defective portion removing device according to any one of claims 7 to 9, further comprising a partial winder and a rotation speed control device that controls a rotation speed of the steel plate coil. The defective portion removing device according to any one of claims 7 to 10, wherein a looper roll that comes into contact with the steel plate is disposed between the defective portion winder and the steel plate coil.